沉重的潜水装备使蛙人行动困难。
他说在高海拔行动困难并不能作为一个借口。
He said the difficulties posed by operating at high altitude were not an excuse.
他们行动困难。
Parkinson's disease is a disease involving destruction of motor control and loss of motor control, difficulty moving.
帕金森症会损害运动控制,丧失对运动的控制,变得行动困难
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